The C128D is a computer system with a separate keyboard, internal power-supply, disk drive (1571) and a motherboard. The C128(D) is the successor of the Commodore C64. The C128(D) computer has two processors, a 8510 and a Z80. The C128 has three different operating modes: C64 mode, C128 mode and CP/M mode.
If you compare the C128(D) with the C64 the C128(D) has a bigger memory, faster processor and better graphical possibilities. But the strong success of the C64 prevented a breakthrough for the C128(D).

MOS 8510, Zilogic Z80 (Diskdrive = MOS 6502)

2 MHz, 4 MHz, (1MHz)

128 kbyte RAM, 64 kbyte ROM

640 x 200 pix, 80 x 25 chr, 16 clr, 8 mob

3 Voices, Noise

Expansionport, Userport, Serialport, Datassette, 2 x Joystick, TV, Video, RGB, Sound.

430 x 360 x 110 mm

Commodore